AD9640ABCPZ-125

Analog To Digital Converters (ADC) Overview

The AD9640ABCPZ-125 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 125 MSPS with an internal voltage reference and differential pipelined architecture. The device supports flexible analog input ranges from 1 V p-p to 2 V p-p and features a 650 MHz bandwidth. Power consumption is 750 mW at 125 MSPS. It offers SNR performance of 71.8 dBc to 70 MHz and SFDR of 85 dBc to 70 MHz. The ADC includes integrated fast detect and signal monitor blocks for automatic gain control. Digital outputs are configurable for 1.8 V to 3.3 V CMOS or 1.8 V LVDS. It is housed in a 64-lead LFCSP package and operates within the industrial temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrated dual 14-bit ADC core with multistage differential pipelined architecture and output error correction logic.
• Built-in fast detect and programmable threshold detector for low-latency overrange detection and automatic gain control.
• Signal monitor block providing composite magnitude monitoring via dedicated serial output mode.
• Flexible digital interface supporting user-selectable data formats including offset binary, two's complement, and gray coding.

Analog To Digital Converters (ADC) Applications

• Communications systems including GSM, EDGE, WCDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA.
• Diversity radio systems and multimode digital receivers.
• I/Q demodulation systems and smart antenna applications.
• General-purpose software radios and broadband data applications.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'A' indicates the higher grade variant compared to the 'B' version when sourcing. Confirm that the ordering part number matches the required 125 MSPS speed bin. Ensure the procurement documentation references the Rev C datasheet for accurate electrical specifications. Cross-reference the manufacturer's official ordering guide to validate availability and packaging details before finalizing orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component for designs requiring high dynamic range and low power consumption in dual-channel architectures. Consider the 1.8 V supply requirement and verify compatibility with the target digital logic family using the DRVDD pin configuration. Evaluate the need for the integrated signal monitor and fast detect features to simplify external AGC circuitry. Ensure the PCB layout accommodates the 64-lead LFCSP package and provides adequate thermal dissipation for the exposed paddle.

Analog To Digital Converters (ADC) Part Context

This part belongs to the AD9640 series, which includes variants operating at 80, 105, 125, and 150 MSPS. The 'A' suffix denotes a specific performance grade within the product line. It shares pin compatibility with the AD9627, AD9627-11, and AD9600, facilitating migration from lower resolution devices. The series is designed for communications applications prioritizing small size and versatility.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives include the AD9627, AD9627-11, and AD9600 for migration from 12-bit, 11-bit, or 10-bit resolutions respectively. Other members of the AD9640 family with different speed grades may be considered if system timing requirements allow.